DeuTex is an editor able to compose and decompose WAD files. It was written in 1994 by Olivier Montanuy based upon DEU and originally ran in DOS. It was later ported to Unix (including GNU/Linux, FreeBSD, and Mac OS X) and Microsoft Windows (with a graphical front-end for Windows 3.1, WinTex). André Majorel maintained DeuTex up until 2005. It is currently maintained by several contributors on GitHub.

DeuTex will convert the format of a lump when extracting or building a WAD. Supported formats are WAV, BMP, GIF, PNG, and PPM. It can also extract various content from the alpha and beta versions of Doom.

Up to version 4.4.902, it included a small version called DeuSF that featured primarily the IWAD merging feature to overcome limitations of the original Doom executables. DOS and OS/2 support have also since been removed and dropped.